Penis: Difference between revisions
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* '''Somatic''' | * '''Somatic''' | ||
** '''Paired dorsal nerves of the penis (paired, S2-S4)''' | ** '''<span style="color:#ff0000">Paired dorsal nerves of the penis (paired, S2-S4)</span>''' | ||
*** '''Arises in the Alcock canal as the first branch of the pudendal nerve (S2-4)''' | *** '''Arises in the Alcock canal as the first branch of the pudendal nerve (S2-4)''' | ||
*** Runs over the surface of the obturator internus under the levator, runs deep to the urogenital diaphragm, and passes through the deep transverse perineal muscle '''to run along the dorsum of the penis accompanied by the dorsal vein and dorsal artery.''' | *** Runs over the surface of the obturator internus under the levator, runs deep to the urogenital diaphragm, and passes through the deep transverse perineal muscle '''to run along the dorsum of the penis accompanied by the dorsal vein and dorsal artery.''' | ||
*** '''Supplies sensory innervation to the glans''' | *** '''Supplies sensory innervation to the glans''' | ||
** Small branches of the perineal nerve supply the ventrum of the penis as distally as the glans | ** Small branches of the perineal nerve supply the ventrum of the penis as distally as the glans | ||
** '''The skin of the penis is innervated by branches of the genitofemoral nerve''' | ** '''<span style="color:#ff0000">The skin of the penis is innervated by branches of the genitofemoral nerve</span>''' | ||
* '''Autonomic''' | * '''Autonomic''' | ||
** '''Paired cavernous nerves (S2-4)''' | ** '''<span style="color:#ff0000">Paired cavernous nerves (S2-4)</span>''' | ||
*** '''Arise from the pelvic plexus''' '''from the lateral surface of the rectum''' | *** '''Arise from the pelvic plexus''' '''from the lateral surface of the rectum''' | ||
*** Run posterolateral to the apex, mid-portion and base of the prostate '''anterior to Denonvilliers’ fascia''' between the posterolateral surface of the prostate and the rectum to '''lie between the lateral pelvic fascia and the prostatic fascia. The branches from the cavernous nerve accompany the branches of the prostatovesicular artery''' '''and provide a macroscopic landmark for nerve-sparing radical prostatectomy i.e. neurovascular bundle.''' | *** Run posterolateral to the apex, mid-portion and base of the prostate '''anterior to Denonvilliers’ fascia''' between the posterolateral surface of the prostate and the rectum to '''lie between the lateral pelvic fascia and the prostatic fascia. The branches from the cavernous nerve accompany the branches of the prostatovesicular artery''' '''and provide a macroscopic landmark for nerve-sparing radical prostatectomy i.e. neurovascular bundle.''' | ||